“ | It's s-o exciting. | ” |
—Doctor O |
Doctor O is a character in Cardfight!! Vanguard Anime. He is a presenter along side with MC Miya and he provided commentary during the National Championship. He claims to be a man who has dedicated his life to Vanguard. He then makes appearances in competition-largest district conference and national competition. He commonly forms the letter O with his fingers to express himself as he talks.